What is the best (free) SMTP solution to use with self hosted apps?

This page summarizes the projects mentioned and recommended in the original post on /r/selfhosted
Mail SMTP Communication systems Docker Email

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  • Postal

    📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

    I use postalserver which is essential an opensource mailgun or sendgrid. The main challenge is not all server companies will allow you to run email servers, due to spammers. Also the IP of the server can play a big role in deliverability if someone before you was abusing that IP. Check it out at https://github.com/postalserver/postal

  • docker-mailserver

    Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.

    I have a small VPS and use https://github.com/docker-mailserver/docker-mailserver as SMTP, IMAP, LDAP, Antispam and Antivirus stack.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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